Fibrin degradation products

Definition

Fibrin degradation products (FDPs) are the substances left behind when clots dissolve in the blood. Blood tests can be done to measure these products.

Alternative Names

FDPs; FSPs; Fibrin split products; Fibrin breakdown products

How the Test is Performed

A sample of blood is taken from your vein.

The blood is sent to a lab where tests are done to measure the products that are left behind when blood clots dissolve.

How to Prepare for the Test

You may need to stop taking some medicines before the test. Drugs that may increase FDPs include barbiturates, heparin, streptokinase, and urokinase.

Do not stop taking any medicine without first talking to your doctor.

How the Test will Feel

You may feel slight pain or a sting when the needle is inserted to draw blood. There may be some throbbing afterward.

Why the Test is Performed

This test is done to see if your clot-dissolving (fibrinolytic) system is working properly. Your doctor may order this test if you have signs of disseminated intravascular coagulation (DIC) or another clot-dissolving disorder.

Normal Results

The result is normally less than 10 micrograms per milliliter (mcg/mL).

Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

The example above shows the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.